<!DOCTYPE html>
<html lang="en">
  <head>
  </head>
  <body>
    <div id="calculator">
      <div>
        1
      </div>
      <div>
        2
      </div>
      <div>
        3
      </div>
      <div>
        4
      </div>
      <div>
        5
      </div>
    </div>
  </body>
</html>
